Force and Laws of Motion
Units and Dimensions :
Weight⟹ W = m*g = kg m./s.²
Momentum⟹p = m*v = kg m./s.
Mass⟹(Kg) (M)
Newton's Laws of Motion
II Law
III Law
I Law
Lesser Mass has lesser inertia
The tendency of undisturbed objects
to stay at rest or keep moving with
the same velocity until and unless, nonzero
external force acts on it
With rate of change of momentum with respect to time
is equal to non-zero external force acting on object.
Every action has an equal and opposite reaction
Force is a push
or pull acting on
a body
• Muscular Force
• Magnetic Force
• Gravitational Force
• Frictional Force→(Always opposes the motion of objects)
Types of Force
Law of Conservation
of Momentum
Momentum before
collision is equal to
momentum after collision
Total Momentum Before the Collision = Total Momentum After the Collision
mAuA + mBuB = mAvA + mBvB
• v = u + at
• s = ut + 1/2at²
• v² = u² + 2as
Equations